Which competitor changes have actually made you change your own plans?

I'm trying to get better at competitor research for SaaS products, but there's one thing I keep struggling with: knowing which updates are actually worth paying attention to.

A competitor might change their pricing, launch a new feature, redesign their website, or announce an integration. It's interesting to see all these changes, but I don't think every update should influence what you build.

My current thinking is that a change matters when it affects how a product is positioned or what customers can do with it. I'm still figuring out how to separate those signals from the noise.

For those who've built or marketed a product, has a competitor ever made a change that genuinely influenced your roadmap, pricing, or messaging? What happened, and how did you decide it was worth acting on?